Work smarter not harder. Many people who work punishing schedules don’t generate value. In fact, some of those long hours are counterproductive because the brain isn’t functioning on all cylinders for 18 hours a day. That said, some people thrive this way (and the organizations they start up or work for) do as well as consequence.
An informed opinion as one of the ones who doesn’t require much sleep — but every two weeks like clockwork, a good 12-hour respite is what makes my 18 hour days productive again. :)